FR2664450B1 - - Google Patents
Info
- Publication number
- FR2664450B1 FR2664450B1 FR9107307A FR9107307A FR2664450B1 FR 2664450 B1 FR2664450 B1 FR 2664450B1 FR 9107307 A FR9107307 A FR 9107307A FR 9107307 A FR9107307 A FR 9107307A FR 2664450 B1 FR2664450 B1 FR 2664450B1
- Authority
- FR
- France
- Prior art keywords
- tone
- amplifier
- detected
- distress
- pump source
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 230000009429 distress Effects 0.000 abstract 3
- 230000003287 optical effect Effects 0.000 abstract 3
- 230000005540 biological transmission Effects 0.000 abstract 2
- 239000013307 optical fiber Substances 0.000 abstract 2
- 239000000835 fiber Substances 0.000 abstract 1
- 230000002269 spontaneous effect Effects 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/07—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/07—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems
- H04B10/075—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal
- H04B10/077—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal using a supervisory or additional signal
- H04B10/0771—Fault location on the transmission path
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/07—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems
- H04B10/075—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal
- H04B10/077—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal using a supervisory or additional signal
- H04B10/0777—Monitoring line amplifier or line repeater equipment
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/40—Monitoring; Testing of relay systems
- H04B17/401—Monitoring; Testing of relay systems with selective localization
- H04B17/402—Monitoring; Testing of relay systems with selective localization using different frequencies
- H04B17/403—Monitoring; Testing of relay systems with selective localization using different frequencies generated by local oscillators
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B2210/00—Indexing scheme relating to optical transmission systems
- H04B2210/07—Monitoring an optical transmission system using a supervisory signal
- H04B2210/075—Monitoring an optical transmission system using a supervisory signal using a pilot tone
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Optical Communication System (AREA)
- Monitoring And Testing Of Transmission In General (AREA)
- Alarm Systems (AREA)
- Testing Of Optical Devices Or Fibers (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB9013513A GB2245121B (en) | 1990-06-16 | 1990-06-16 | Telemetry |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2664450A1 FR2664450A1 (fr) | 1992-01-10 |
FR2664450B1 true FR2664450B1 (fr) | 1994-12-09 |
Family
ID=10677772
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR9107154A Granted FR2663480A1 (fr) | 1990-06-16 | 1991-06-12 | Procede et appareil de telemetrie analogique pour systeme de transmission optique. |
FR9107307A Granted FR2664450A1 (fr) | 1990-06-16 | 1991-06-14 | Procede et installation de telemetrie analogique. |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR9107154A Granted FR2663480A1 (fr) | 1990-06-16 | 1991-06-12 | Procede et appareil de telemetrie analogique pour systeme de transmission optique. |
Country Status (4)
Country | Link |
---|---|
US (1) | US5483233A (fr) |
JP (1) | JP3150997B2 (fr) |
FR (2) | FR2663480A1 (fr) |
GB (1) | GB2245121B (fr) |
Families Citing this family (22)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB9008895D0 (en) * | 1990-04-20 | 1990-06-20 | British Telecomm | Optical communications link fault signalling |
JP2778438B2 (ja) * | 1993-12-27 | 1998-07-23 | 日本電気株式会社 | 光増幅装置と光増幅器設計方法と光中継伝送システム |
JPH088835A (ja) * | 1994-06-21 | 1996-01-12 | Fujitsu Ltd | 光伝送方式 |
GB2326548B (en) * | 1994-06-21 | 1999-03-10 | Fujitsu Ltd | Optical transmission apparatus |
US5594748A (en) * | 1995-08-10 | 1997-01-14 | Telephone Information Systems, Inc. | Method and apparatus for predicting semiconductor laser failure |
GB2314224A (en) * | 1996-06-11 | 1997-12-17 | Stc Submarine Systems Ltd | Fibre optic transmission |
US5898801A (en) | 1998-01-29 | 1999-04-27 | Lockheed Martin Corporation | Optical transport system |
US6580530B1 (en) | 1998-05-29 | 2003-06-17 | Cisco Photonics Italy S.R.L. | Optical communication system |
US20030147126A1 (en) * | 2000-04-13 | 2003-08-07 | Lutz Rapp | Method and device for regulating a medium with an amplifying effect, especially a fiber optical waveguide |
US20020101874A1 (en) * | 2000-11-21 | 2002-08-01 | Whittaker G. Allan | Physical layer transparent transport information encapsulation methods and systems |
JP2002198598A (ja) * | 2000-12-22 | 2002-07-12 | Nec Corp | 光増幅利得制御回路および光増幅利得制御方法 |
US6751014B2 (en) * | 2001-06-19 | 2004-06-15 | International Business Machines Corporation | Automatic gain control and dynamic equalization of erbium doped optical amplifiers in wavelength multiplexing networks |
US7190897B2 (en) * | 2001-07-02 | 2007-03-13 | Lucent Technologies Inc. | Optical channel operating parameters monitoring |
US7085497B2 (en) | 2002-04-03 | 2006-08-01 | Lockheed Martin Corporation | Vehicular communication system |
US6912339B2 (en) | 2002-09-27 | 2005-06-28 | Lockheed Martin Corporation | Optical interface devices having balanced amplification |
US20040076434A1 (en) * | 2002-09-27 | 2004-04-22 | Whittaker G. Allan | Optical distribution network for RF and other analog signals |
US7283480B1 (en) | 2002-11-12 | 2007-10-16 | Lockheed Martin Corporation | Network system health monitoring using cantor set signals |
US7349629B1 (en) | 2002-11-26 | 2008-03-25 | Lockheed Martin Corporation | Methods and systems for creating a digital interconnect fabric |
US7570887B2 (en) * | 2003-03-31 | 2009-08-04 | Lockheed Martin Corporation | Optical network interface systems and devices |
US7424228B1 (en) | 2003-03-31 | 2008-09-09 | Lockheed Martin Corporation | High dynamic range radio frequency to optical link |
US7151895B2 (en) * | 2003-08-26 | 2006-12-19 | Fujitsu Limited | Method and system for automatically setting gain for an amplifier in an optical network |
US7440699B1 (en) | 2004-06-28 | 2008-10-21 | Lockheed Martin Corporation | Systems, devices and methods for transmitting and receiving signals on an optical network |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1211275B (de) * | 1964-05-27 | 1966-02-24 | Siemens Ag | Anordnung zur Ortung von Fehlern in einer TF-UEbertragungsstrecke |
JPS575447A (en) * | 1980-06-13 | 1982-01-12 | Toshiba Corp | Failure detecting system |
US4468773A (en) * | 1981-05-29 | 1984-08-28 | Seaton Norman T | Laser control apparatus and method |
NL8200002A (nl) * | 1982-01-04 | 1983-08-01 | Philips Nv | Foutlocalisatie-inrichting voor digitaal optische transmissiesysteem. |
EP0331304B1 (fr) * | 1988-03-04 | 1993-11-24 | BRITISH TELECOMMUNICATIONS public limited company | Amplification de signaux optiques |
GB2230912B (en) * | 1989-04-22 | 1993-10-20 | Stc Plc | Optical amplifier gain control |
US5087108A (en) * | 1989-08-11 | 1992-02-11 | Societa' Cavi Pirelli S.P.A. | Double-core active-fiber optical amplifier having a wide-band signal wavelength |
JP3137632B2 (ja) * | 1989-08-31 | 2001-02-26 | 富士通株式会社 | 光ファイバ増幅器を備えた光通信方式 |
-
1990
- 1990-06-16 GB GB9013513A patent/GB2245121B/en not_active Expired - Fee Related
-
1991
- 1991-06-12 FR FR9107154A patent/FR2663480A1/fr active Granted
- 1991-06-14 FR FR9107307A patent/FR2664450A1/fr active Granted
- 1991-06-17 JP JP14501391A patent/JP3150997B2/ja not_active Expired - Fee Related
-
1993
- 1993-11-12 US US08/152,243 patent/US5483233A/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
GB2245121A (en) | 1991-12-18 |
FR2663480B1 (fr) | 1995-01-27 |
US5483233A (en) | 1996-01-09 |
FR2663480A1 (fr) | 1991-12-20 |
JP3150997B2 (ja) | 2001-03-26 |
FR2664450A1 (fr) | 1992-01-10 |
GB9013513D0 (en) | 1990-08-08 |
GB2245121B (en) | 1994-03-16 |
JPH04239236A (ja) | 1992-08-27 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
CD | Change of name or company name | ||
ST | Notification of lapse |